No because a drone is the lowest on the totem pole. And is just about impossible to see from any manned aircraft due to it tiny size in the sky. Trust me, even full size aircraft easily get lost in background clutter when you fly and are looking...
Check the CAA regs for the exact wording. Large gatherings of people, you cannot overfly, you must fly around. A few walkers on the ground, like I saw from your drone, means you just need to skirt around them when flying lower. The area you...
Could not see the aircraft you said was only 100ft above the ridge. However, from the sound, that did not seem like it was as close and low as you think it was. Most people vastly underestimate the height an aircraft is, to them.
As to the...